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I'll add some thoughts as I have had both AutoSolutions and CAE on my E92. Will be going back to AutoSolutions on the E92 so I can have the CAE ready to swap onto my E46 this year when I intentionally kill SMG.
AutoSolutions is about 15% reduction - feels good, more feedback than stock. I hesitate to say more precise as it doesn't fundamentally do anything to change or alter the mechanics of the transmission or the shift action. You will still have some side to side play in gear and no additional centering force. Personally I think slightly stiffer detent springs would really complement this type of shifter. Still nice improvement over stock though I feel that much of the hype is just that... hype.
CAE is incredible when it's dialed in right - shifting is just so satisfying when driving hard, and is even a fun novelty when driving normally. However... and it's a big HOWEVER, you will need to do some supporting mods like engine mounts and trans mounts to ensure that your shifts are accurate. This will introduce a significant amount of NVH into the cabin - the worst of which is from trans mounts. It's not the good kind of NVH either. Additionally, chassis mount shifters with large levers can be quite hard on synchros if you don't understand that absolutely nothing changes about your transmission just because you installed a shifter. You couldn't absolutely slam gears before and you still can't after, yet having such large lever allows you to do so and thus you'll wreck your synchros. So syncho wear IMO is really a user error because you can shift a CAE with very minimal effort and let the synchros do their job and have no additional wear over a trans mount shifter.
Had a street height RTD but that shifter was absolutely terrible. Manufacturing looked great, operation was awful.
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